I know you were just throwing out a number but I'm going to lower the boom anyway..
Asbury and Wooly would sometimes get 4,500 people to show up, and I'm guessing their average attendance was around 5k....Conference games would put 8k depending on opponent... and the KU game would be solid red and blue behind the nets and a near sell out.
Manhattan, while a great town, is small as @#$#@ and won't support a loser.